#!/bin/bash

GDAL_TILE_PROCESSES=16
GDAL_TILE_ZOOMS=8-14
GDAL_SAMPLING_WARP=cubic
GDAL_SAMPLING_TILE=antialias

# Create virtual dataset with coordinates
gdal_translate -of VRT -a_srs EPSG:4326 -outsize 300% 300% -gcp 4962.0 6192.0 22.541781666666665 57.228345 -gcp 40386.0 6324.0 22.583443333333335 57.228345 -gcp 40350.0 40068.0 22.583443333333335 57.207515 -gcp 4932.0 39936.0 22.541781666666665 57.207515 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-001343-PLANSETE-023-a-6_1343.JPG LVVA-001679-0217-001343-PLANSETE-023-a-6_1343.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4962.0 6192.0\n40386.0 6324.0\n40350.0 40068.0\n4932.0 39936.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-001343-PLANSETE-023-a-6_1343.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-001343-PLANSETE-023-a-6_1343.vrt LVVA-001679-0217-001343-PLANSETE-023-a-6_1343.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-001343-PLANSETE-023-a-6_1343.cut.vrt LVVA-001679-0217-001343-PLANSETE-023-a-6_1343.xyz